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From: Pavel Begunkov <[email protected]>
To: [email protected]
Cc: Jens Axboe <[email protected]>, [email protected]
Subject: [PATCH liburing 2/3] examples: add a simple single-shot poll benchmark
Date: Wed, 15 Jun 2022 11:05:11 +0100	[thread overview]
Message-ID: <c73aebd699e851a36a8a85e263bedc56aa57e505.1655213733.git.asml.silence@gmail.com> (raw)
Message-ID: <20220615100511.8t9GkO0ZWY_tusGQWGDxzzpQEyhi9KDBzkXRkpiZ53M@z> (raw)
In-Reply-To: <[email protected]>

Signed-off-by: Pavel Begunkov <[email protected]>
---
 examples/Makefile     |   3 +-
 examples/poll-bench.c | 108 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 110 insertions(+), 1 deletion(-)
 create mode 100644 examples/poll-bench.c

diff --git a/examples/Makefile b/examples/Makefile
index 95a45f9..8e7067f 100644
--- a/examples/Makefile
+++ b/examples/Makefile
@@ -13,7 +13,8 @@ endif
 example_srcs := \
 	io_uring-cp.c \
 	io_uring-test.c \
-	link-cp.c
+	link-cp.c \
+	poll-bench.c
 
 all_targets :=
 
diff --git a/examples/poll-bench.c b/examples/poll-bench.c
new file mode 100644
index 0000000..72ba8ef
--- /dev/null
+++ b/examples/poll-bench.c
@@ -0,0 +1,108 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Description: test io_uring poll handling
+ *
+ */
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <poll.h>
+#include <sys/time.h>
+#include <sys/wait.h>
+
+#include "liburing.h"
+
+static char buf[4096];
+static unsigned long runtime_ms = 30000;
+
+static unsigned long gettimeofday_ms(void)
+{
+	struct timeval tv;
+
+	gettimeofday(&tv, NULL);
+	return (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
+}
+
+int main(void)
+{
+	unsigned long tstop;
+	unsigned long nr_reqs = 0;
+	struct io_uring_cqe *cqe;
+	struct io_uring_sqe *sqe;
+	struct io_uring ring;
+	int pipe1[2];
+	int ret, i, qd = 128;
+
+	if (argc > 1)
+		return 0;
+
+	if (pipe(pipe1) != 0) {
+		perror("pipe");
+		return 1;
+	}
+
+	ret = io_uring_queue_init(1024, &ring, IORING_SETUP_SINGLE_ISSUER);
+	if (ret == -EINVAL) {
+		fprintf(stderr, "can't single\n");
+		ret = io_uring_queue_init(1024, &ring, 0);
+	}
+	if (ret) {
+		fprintf(stderr, "child: ring setup failed: %d\n", ret);
+		return 1;
+	}
+
+	ret = io_uring_register_files(&ring, pipe1, 2);
+	if (ret < 0) {
+		fprintf(stderr, "io_uring_register_files failed\n");
+		return 1;
+	}
+
+	ret = io_uring_register_ring_fd(&ring);
+	if (ret < 0) {
+		fprintf(stderr, "io_uring_register_ring_fd failed\n");
+		return 1;
+	}
+
+	tstop = gettimeofday_ms() + runtime_ms;
+	do {
+		for (i = 0; i < qd; i++) {
+			sqe = io_uring_get_sqe(&ring);
+			io_uring_prep_poll_add(sqe, 0, POLLIN);
+			sqe->flags |= IOSQE_FIXED_FILE;
+			sqe->user_data = 1;
+		}
+
+		ret = io_uring_submit(&ring);
+		if (ret != qd) {
+			fprintf(stderr, "child: sqe submit failed: %d\n", ret);
+			return 1;
+		}
+
+		ret = write(pipe1[1], buf, 1);
+		if (ret != 1) {
+			fprintf(stderr, "write failed %i\n", errno);
+			return 1;
+		}
+		ret = read(pipe1[0], buf, 1);
+		if (ret != 1) {
+			fprintf(stderr, "read failed %i\n", errno);
+			return 1;
+		}
+
+		for (i = 0; i < qd; i++) {
+			ret = io_uring_wait_cqe(&ring, &cqe);
+			if (ret < 0) {
+				fprintf(stderr, "child: wait completion %d\n", ret);
+				break;
+			}
+			io_uring_cqe_seen(&ring, cqe);
+			nr_reqs++;
+		}
+	} while (gettimeofday_ms() < tstop);
+
+	fprintf(stderr, "requests/s: %lu\n", nr_reqs * 1000UL / runtime_ms);
+	return 0;
+}
-- 
2.36.1


  parent reply	other threads:[~2022-06-15 10:05 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-14 14:36 [PATCH liburing 0/3] single-issuer and poll benchmark Pavel Begunkov
2022-06-14 14:36 ` [PATCH liburing 1/3] io_uring: update headers with IORING_SETUP_SINGLE_ISSUER Pavel Begunkov
2022-06-15 10:05   ` Pavel Begunkov
2022-06-15 10:28   ` Pavel Begunkov
2022-06-15 10:30     ` Pavel Begunkov
2022-06-14 14:36 ` Pavel Begunkov [this message]
2022-06-14 14:57   ` [PATCH liburing 2/3] examples: add a simple single-shot poll benchmark Ammar Faizi
2022-06-14 15:05     ` Pavel Begunkov
2022-06-15 10:05   ` Pavel Begunkov
2022-06-14 14:36 ` [PATCH liburing 3/3] tests: test IORING_SETUP_SINGLE_ISSUER Pavel Begunkov
2022-06-15 10:05   ` Pavel Begunkov
2022-06-15 10:05 ` [PATCH liburing 0/3] single-issuer and poll benchmark Pavel Begunkov

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